GT® Series X 镍钛根管锉、扭转镍钛锉和 AlphaKite 镍钛锉在模拟根管中成形能力的比较。
Comparison of the shaping ability of GT® Series X, Twisted Files and AlphaKite rotary nickel-titanium systems in simulated canals.
机构信息
Department of Operative Dentistry and Periodontology, Dental School University of Rostock, Strempelstr 13, 18057 Rostock, Germany.
出版信息
BMC Oral Health. 2013 Dec 17;13:72. doi: 10.1186/1472-6831-13-72.
BACKGROUND
Efforts to improve the performance of rotary NiTi instruments by enhancing the properties of NiTi alloy, or their manufacturing processes rather than changes in instrument geometries have been reported. The aim of this study was to compare in-vitro the shaping ability of three different rotary nickel-titanium instruments produced by different manufacturing methods.
METHODS
Thirty simulated root canals with a curvature of 35˚ in resin blocks were prepared with three different rotary NiTi systems: AK- AlphaKite (Gebr. Brasseler, Germany), GTX- GT® Series X (Dentsply, Germany) and TF- Twisted Files (SybronEndo, USA).The canals were prepared according to the manufacturers' instructions. Pre- and post-instrumentation images were recorded and assessment of canal curvature modifications was carried out with an image analysis program (GSA, Germany).The preparation time and incidence of procedural errors were recorded. Instruments were evaluated under a microscope with 15 × magnifications (Carl Zeiss OPMI Pro Ergo, Germany) for signs of deformation. The Data were statistically analyzed using SPSS (Wilcoxon and Mann-Whitney U-tests, at a confidence interval of 95%).
RESULTS
Less canal transportation was produced by TF apically, although the difference among the groups was not statistically significant. GTX removed the greatest amount of resin from the middle and coronal parts of the canal and the difference among the groups was statistically significant (p < 0.05). The shortest preparation time was registered with TF (444 s) and the longest with GTX (714 s), the difference among the groups was statistically significant (p < 0.05). During the preparation of the canals no instrument fractured. Eleven instruments of TF and one of AK were deformed.
CONCLUSION
Under the conditions of this study, all rotary NiTi instruments maintained the working length and prepared a well-shaped root canal. The least canal transportation was produced by AK. GTX displayed the greatest cutting efficiency. TF prepared the canals faster than the other two systems.
背景
为了提高镍钛合金的性能或其制造工艺，而不是改变器械的几何形状，以提高旋转镍钛器械的性能的努力已有报道。本研究的目的是比较三种不同制造方法生产的三种不同旋转镍钛器械的成形能力。
方法
在树脂块中制备 30 个具有 35°曲率的模拟根管，使用三种不同的旋转镍钛系统：AK-AlphaKite（德国 Gebr. Brasseler）、GTX-GT®系列 X（德国 Dentsply）和 TF-Twisted Files（美国 SybronEndo）。根据制造商的说明进行器械预备。记录预备前后的图像，并使用图像分析程序（德国 GSA）评估根管弯曲度的改变。记录预备时间和操作失误的发生率。使用 15×放大倍数的显微镜（德国 Carl Zeiss OPMI Pro Ergo）评估器械的变形情况。使用 SPSS（Wilcoxon 和 Mann-Whitney U 检验，置信区间为 95%）对数据进行统计学分析。
结果
TF 在根尖处产生的根管偏移较少，但组间差异无统计学意义。GTX 从中段和冠段去除了最多的树脂，组间差异有统计学意义（p<0.05）。TF 的预备时间最短（444 s），GTX 的预备时间最长（714 s），组间差异有统计学意义（p<0.05）。在预备过程中，没有器械折断。11 根 TF 器械和 1 根 AK 器械变形。
结论
在本研究条件下，所有旋转镍钛器械均保持工作长度，预备出形态良好的根管。AK 产生的根管偏移最小。GTX 显示出最大的切削效率。TF 比其他两种系统更快地预备根管。
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